Peter Kramer/NBC(NEW YORK) -- Former President George W. Bush is getting ready to add another job to his resume – grandpa.

His daughter, 31-year-old Jenna Bush Hager, announced she is pregnant on NBC’s Today show, where she is a correspondent.

It will be the first grandchild for George and Laura Bush, who have remained largely out of the spotlight since leaving the White House.

In a phone call to the show, the former president said he was “fired up” about becoming a grandfather. When asked what he’d like to be called by the newest addition to the family – “Gampy” or “Gramps,” for example – he responded with a firm “Sir!” His daughter said she had suggested “Pancho.”

“I’m thrilled for Jenna and Henry,” said Laura Bush of the couple, who has been married for four years.